public static void Main()
Console.WriteLine("n= ");
int n = int.Parse(Console.ReadLine());
b[i] = int.Parse(Console.ReadLine());
else if(b[i] > 200 && b[i] < 400)
else if(b[i] >= 400 && b[i] < 600)
else if(b[i] >= 600 && b[i] < 800)
else if(b[i] >= 800 && b[i] < 1001)
Console.WriteLine("p1 = " + Math.Round(p1,2) +"%");
Console.WriteLine("p2 = " + Math.Round(p2,2)+ "%");
Console.WriteLine("p3 = " + Math.Round(p3,2)+ "%");
Console.WriteLine("p4 = " + Math.Round(p4,2)+ "%");
Console.WriteLine("p5 = " + Math.Round(p5,2)+ "%");